fermi questions

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Fermi Questions How to Know What You Know

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Presentation slides for Ignite Salt Lake 2011 on Fermi Questions. It's kind of fluffy without the talk behind it, but there it is.

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Page 1: Fermi Questions

Fermi Questions

How to Know What You Know

Page 2: Fermi Questions

And Do Something About It

Page 3: Fermi Questions

why?

understand and contribute

Page 4: Fermi Questions

why?

deal with a gazilion bits of daily information

Page 5: Fermi Questions

who?Enrico Fermi

Page 6: Fermi Questions

what?

• Piano tuners in Chicago? 125• Jelly beans in a liter jar? 240• Extraterrestrial civilizations in the

galaxy? 2.31 

Page 7: Fermi Questions

not really

but kind of

Page 8: Fermi Questions

useful before you

put a gazillion hours into a project

Page 9: Fermi Questions

how?

specific question

simple questions

add it up

check for sanity

Page 10: Fermi Questions

how?

specific questions

simple questions

add it up

check for sanity

Page 11: Fermi Questions

how?

specific questions

simple questions

add it up

check for sanity

Page 12: Fermi Questions

how?

specific questions

simple questions

add it up

check for sanity

Page 13: Fermi Questions

A Good Sanity Check

Monte Carlo Methods

Page 14: Fermi Questions

Run it a Gazillion Times

Then Add It Up

Page 15: Fermi Questions

Think in Ranges

Page 16: Fermi Questions

Doesn't Have to Be Mathy

Page 17: Fermi Questions

Poll of 5

Page 18: Fermi Questions

Go Wild

• How long until a cure for cancer?• How many people have Maple

Syrup Urine Disease?• How many people might buy my

product?

Page 19: Fermi Questions

Go Wild

Page 20: Fermi Questions

Support and Attributions

Practice and Sharehttp://openmobi.us

• Slide 5: Enrico Fermi by Argonne National Laboratory CC BY-NC-SA 3.0

• Slide 9: Focus by ihtatho CC BY-NC 3.0• Slide 11: question marks by Gillian Maniscalco 

CC BY-SA 3.0• Slide 16: Albert Einstein by Thomas Thomas CC BY-NC 3.0• Slide 17: Mosaic by Leo Reynolds CC BY-NC-SA 3.0